Figure 1.

Serial MR images of gliomatosis cerebri. Case 2: (A & B) at the initial presentation, highly infiltrated lesion is found
on the FLAIR image, but there is no enhancing lesion on the T1 weighted enhanced image
(T1WI), (C & D) After 3 months, the tumor is widely spread on the FLAIR images and
new contrast-enhancing lesions diffusely appears on the T1WI.